Filter adapter head



FIG. 1 is a top plan view of a filter adapter head showing our new design;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof, the left side being substantially identical mirror image; and,

FIG. 5 is a top and right side perspective view thereof. 

The ornamental design for a filter adapter head, as shown and described. 